Publications

A gravel pit that was a source of happy childhood memories showcases the evolution of mining technology.

A scenic trek always includes an interesting landmark - a volcanic cinder cone.

A Front Range perspective on managing and shipping aggregates.

This versatile mineral has been used in everything from ceremonial rattles to sonar transducers to quartz watches.

Annual non-metallic minerals are typically twice the value of metallic minerals, which takes a little of the sparkle out of gold.

Among the many European millstones, the geology of the French burrstone was prized for the effect of its quartz grain.

Although a relative youngster in geologic terms, obsidian can change over time from glass to mineral.

This report, which is one of a series of reports on metals recycling, defines and quantifies the flow of tungsten-bearing materials in the United States from imports and stock releases through consumption and disposition in 2000, with particular emphasis on the recycling of industrial scrap (new scrap) and used products (old scrap). Because of tungsten's many diverse uses, numerous types of scrap

No abstract available.

We used a hydrodynamics model to assess the consequences of climate warming and contemporary geomorphic evolution for thermal conditions in a large, shallow Alaskan lake. We evaluated the effects of both known climate and landscape change, including rapid outlet erosion and migration of the principal inlet stream, over the past 50 yr as well as future scenarios of geomorphic restoration. Compared

Noble gas recharge temperatures (NGTs) and radiocarbon ages were determined for 43 groundwater samples collected in the eastern Española Basin, New Mexico (USA), to identify mountain-block recharge in waters <10 thousand years (ka) old and to evaluate possible changes in mountain-block recharge over the past ∼35 ka. For Holocene samples from the southeastern area, NGTs are dominantly 2–4° cooler t

<p>The <i>Statistical Abstract of the United States</i>, published since 1878, is the authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States.</p> <br/> <p>Use the Abstract as a convenient volume for statistical reference, and as a guide to sources of more information both in print and on the Web.</p> <br/> <p>Sources of data i